Improve behavior when Firebase isn't configured

Provide an empty configuration in the expected place so the build succeeds
Check for an API key in the config and fall back to local storage

src/pages/operator/ts/model/firebase.config.ts

@@ -0,0 +1,6 @@
+import {FirebaseOptions} from "firebase/app";
+
+// Provide a configuration if you'd like to use Firebase.
+// Don't commit your secrets!
+export const CONFIG: FirebaseOptions = {
+}

src/pages/operator/ts/model/firebasemodel.ts

@@ -25,7 +25,7 @@ export class FirebaseModel extends Model {
 	private localSettings?: Settings
 	private sessions: string[] = [];
 
-	constructor(config = CONFIG, readyCallback = (model: FirebaseModel) => { }) {
+	constructor(config: FirebaseOptions = CONFIG, readyCallback = (model: FirebaseModel) => { }) {
 		super();
 		this.isAnonymous = false;
 		this.uid = "";
@@ -343,4 +343,9 @@ export class FirebaseModel extends Model {
 		updates['/users/' + (this.uid) + '/settings'] = settings;
 		return update(ref(this.database), updates);
 	}
+
+	static isConfigurationValid(config: FirebaseOptions) {
+		// Do we atleast have a key configured?
+		return config.apiKey != undefined
+	}
 }